Improvement in window-screens



UNITED STATES PATENT OFFICE LEVI W. FIFIELD, OF WORCESTER,MASSACHUSETTS.

IMPROVEMENT IN WINDOW-SCREENS. A, "i

Specification forming part of Letters Patent No. 136,826, dated March18, 1873.

dowScreens; and I do hereby declare that the following is a full, clear,and exact descrip- `tion thereof, reference being had to theaccompanying drawing and to the letters of reference marked thereonwhich form apart of this specication.

The nature of my invention consists in the construct-ion and arrangementof an adjustable window-screen, as will be hereinafter more fully setforth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which-Figure l is a front elevation, and Fig. 2 a side view, ot' my invention.

- A represents a frame of any suitable dimen- "sions, which is to befilled with any suitable material to answer for a screen. In one side ofthe frame A is an adjustable slide, B, which is attached to metal guidesC G sliding in grooves or recesses on the sides of the frame. Across theframe A is a metal guide-plate, D, with thumb-nut a in the tentertggioldf'th'emm' slide in the frame when putting it into thewindow-frame. Then, by loosening the thumbnut a, the slide B adjustsitself by means of springs b b arranged within the side pieces of theframe, and fits the opening. This thumbnut can also be used to lock thescreen when p in the window so that it cannot be opened from theoutside. The metal guides C C have each a slot, e, through which ascrew, d, passes and stops the slide at a suitable point.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The guides C C, springs b b, thumb-nut a, and slide B, in combinationwith the bar D and frame A, all constructed and arranged substantiallyas and for the purpose specied.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

LEVI W. FIFIELD. `Witnesses:

SAMUEL SMITH, ABBIE S. BEYWOOD.

